<!DOCTYPE html>
<html  lang="zh-CN" >
<head>
  <meta charset="UTF-8">
  <meta name="viewport"
    content="width=device-width, initial-scale=1.0, minimum-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <meta name="theme-color" content="#fff" id="theme-color">
  <meta name="description" content="深山磨柴斧，一鸣震江湖">
  <link rel="icon" href="/img/ic_head.jpg">
  <title>023-Android动画（3）：插值器与估值器详解</title>
  
  
  <meta property="og:title" content="023-Android动画（3）：插值器与估值器详解">
  
  
  <meta property="og:url" content="http://example.com/2019/09/02/023-Android%E5%8A%A8%E7%94%BB%EF%BC%883%EF%BC%89%EF%BC%9A%E6%8F%92%E5%80%BC%E5%99%A8%E4%B8%8E%E4%BC%B0%E5%80%BC%E5%99%A8%E8%AF%A6%E8%A7%A3/index.html">
  
  
  <meta property="og:img" content="/img/ic_head.jpg">
  
  
  <meta property="og:img" content="深山磨柴斧，一鸣震江湖">
  
  
  <meta property="og:type" content="article">
  <meta property="og:article:published_time" content="2019-09-02">
  <meta property="og:article:modified_time" content="2021-04-14">
  <meta property="og:article:author" content="Cupster">
  
  
  <meta property="og:article:tag" content="Android">
  
  <meta property="og:article:tag" content="Android动画">
  
  
  
  
  <script>
    // control reverse button
    var reverseDarkList = {
      dark: 'light',
      light: 'dark'
    };
    var themeColor = {
      dark: '#1c1c1e',
      light: '#fff'
    }
    // get the data of css prefers-color-scheme
    var getCssMediaQuery = function() {
      return window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light';
    };
    // reverse current darkmode setting function
    var reverseDarkModeSetting = function() {
      var setting = localStorage.getItem('user-color-scheme');
      if(reverseDarkList[setting]) {
        setting = reverseDarkList[setting];
      } else if(setting === null) {
        setting = reverseDarkList[getCssMediaQuery()];
      } else {
        return;
      }
      localStorage.setItem('user-color-scheme', setting);
      return setting;
    };
    // apply current darkmode setting
    var setDarkmode = function(mode) {
      var setting = mode || localStorage.getItem('user-color-scheme');
      if(setting === getCssMediaQuery()) {
        document.documentElement.removeAttribute('data-user-color-scheme');
        localStorage.removeItem('user-color-scheme');
        document.getElementById('theme-color').content = themeColor[setting];
      } else if(reverseDarkList[setting]) {
        document.documentElement.setAttribute('data-user-color-scheme', setting);
        document.getElementById('theme-color').content = themeColor[setting];
      } else {
        document.documentElement.removeAttribute('data-user-color-scheme');
        localStorage.removeItem('user-color-scheme');
        document.getElementById('theme-color').content = themeColor[getCssMediaQuery()];
      }
    };
    setDarkmode();
  </script>
  <script>
    function loadScript(url, cb) {
      var script = document.createElement('script');
      script.src = url;
      if (cb) script.onload = cb;
      script.async = true;
      document.body.appendChild(script);
    }
  </script>
  
  <link rel="preload" href="//at.alicdn.com/t/font_1946621_i1kgafibvw.css" as="style" >
  <link rel="preload" href="//at.alicdn.com/t/font_1952792_89b4ac4k4up.css" as="style" >
  
  <link rel="preload" href="/js/lib/lightbox/baguetteBox.min.js" as="script">
  <link rel="preload" href="/js/lib/lightbox/baguetteBox.min.css" as="style" >
  
  
  <link rel="preload" href="/js/lib/lozad.min.js" as="script">
  
  
  
  
  
  
  
  
<link rel="stylesheet" href="/css/main.css">

  
  
<link rel="stylesheet" href="//at.alicdn.com/t/font_1946621_i1kgafibvw.css">

  
  
<link rel="stylesheet" href="//at.alicdn.com/t/font_1952792_89b4ac4k4up.css">

  
  
<link rel="stylesheet" href="/js/lib/lightbox/baguetteBox.min.css">

  
  
  
  
<meta name="generator" content="Hexo 5.4.0"></head>


<body>
  <div class="wrapper">
    
    <nav class="navbar">
  <div class="navbar-logo">
    <span class="navbar-logo-main">
      
      <img class="navbar-logo-img" src="/img/ic_head.jpg" alt="logo">
      
      <span class="navbar-logo-dsc">不负明天</span>
    </span>
  </div>
  <div class="navbar-menu">
    
    <a href="/" class="navbar-menu-item">
    
    首页
    
    </a>
    
    <a href="/archives" class="navbar-menu-item">
    
    归档
    
    </a>
    
    <a href="/tags" class="navbar-menu-item">
    
    标签
    
    </a>
    
    <a href="/categories" class="navbar-menu-item">
    
    分类
    
    </a>
    
    <a href="/about" class="navbar-menu-item">
    
    关于
    
    </a>
    
    <a href="/links" class="navbar-menu-item">
    
    友链
    
    </a>
    
    <a class="navbar-menu-item darknavbar" id="dark"><i class="iconfont icon-weather"></i></a>
    <a class="navbar-menu-item searchnavbar" id="search"><i class="iconfont icon-search" style="font-size: 1.2rem; font-weight: 400;"></i></a>
  </div>
</nav>
    
    <div id="local-search" style="display: none;">
      <input class="navbar-menu-item" id="search-input" placeholder="请输入搜索内容...">
      <div id="search-content"></div>
    </div>
    
    <div class="section-wrap">
      <div class="container">
        <div class="columns">
          <main class="main-column">
<article class="card card-content">
  <header>
    <h1 class="post-title">
      023-Android动画（3）：插值器与估值器详解
    </h1>
  </header>
  <div class="post-meta post-show-meta">
    <time datetime="2019-09-02T04:33:22.000Z">
      <i class="iconfont icon-calendar" style="margin-right: 2px;"></i>
      <span>2019-09-02</span>
    </time>
    
    <span class="dot"></span>
    
    <a href="/categories/Android/" class="post-meta-link">Android</a>
    
    
    
    <span class="dot"></span>
    <span>1.1k 字</span>
    
  </div>
  
  <div class="post-meta post-show-meta" style="margin-top: -10px;">
    <div style="display: flex; align-items: center;">
      <i class="iconfont icon-biaoqian" style="margin-right: 2px; font-size: 1.15rem;"></i>
      
      
        <a href="/tags/Android/" class="post-meta-link">Android</a>
      
      
      <span class="dot"></span>
      
        <a href="/tags/Android动画/" class="post-meta-link">Android动画</a>
      
    </div>
  </div>
  
  </header>
  <div id="section" class="post-content">
    <p><a target="_blank" rel="noopener" href="https://blog.csdn.net/Cupster/article/details/113643324">【5年Android从零复盘系列之二十三】Android动画（3）：插值器与估值器</a></p>
<hr/>


<h1 id="1-简述"><a href="#1-简述" class="headerlink" title="1.简述"></a>1.简述</h1><p>Android有三种动画，分别是<a target="_blank" rel="noopener" href="https://blog.csdn.net/Cupster/article/details/113524191">视图动画</a>，<a target="_blank" rel="noopener" href="https://blog.csdn.net/Cupster/article/details/113616486">属性动画</a>，帧动画。</p>
<p>其中，帧动画因为资源占用大、性能差、内存溢出等不足,实际开发不推荐使用。</p>
<h1 id="2-插值器-Interpolator"><a href="#2-插值器-Interpolator" class="headerlink" title="2. 插值器 Interpolator"></a>2. 插值器 Interpolator</h1><p>类似物理中的加速度，定义动画进度值变化的速度，默认为线性变化。</p>
<p>android中定义的插值器：</p>
<table>
<thead>
<tr>
<th>插值器</th>
<th>功能</th>
</tr>
</thead>
<tbody><tr>
<td>AccelerateDecelerateInterpolator</td>
<td>先加速，后减速</td>
</tr>
<tr>
<td>LinearInterpolator</td>
<td>默认线性，匀速变化，无实际使用</td>
</tr>
<tr>
<td>AccelerateInterpolator</td>
<td>加速运行至结束</td>
</tr>
<tr>
<td>DecelerateInterpolator</td>
<td>减速运行至结束</td>
</tr>
<tr>
<td>OvershootInterpolator</td>
<td>越界折返</td>
</tr>
<tr>
<td>AnticipateInterpolator</td>
<td>先后退一小步再加速</td>
</tr>
<tr>
<td>AnticipateOvershootInterpolator</td>
<td>先后退一小步再加速，超出终点一小部分后再折回</td>
</tr>
<tr>
<td>BounceInterpolator</td>
<td>弹性插值器，篮球落地回弹效果</td>
</tr>
<tr>
<td>CycleInterpolator</td>
<td>周期循环</td>
</tr>
</tbody></table>
<h1 id="2-1-自定义插值器"><a href="#2-1-自定义插值器" class="headerlink" title="2.1 自定义插值器"></a>2.1 自定义插值器</h1><p>通常自定义插值器需实现Interceptor接口</p>
<pre><code>1. 属性动画用的插值器需实现TimeInterpolator接口；
2. 补间动画用的插值器需实现Interpolator
3. Interpolator继承了TimeInterceptor
</code></pre>
<p>接口</p>
<pre class="highlight"><span class="line"><span class="comment">//input表示进度值0%-100%</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">interface</span> <span class="title">TimeInterpolator</span> </span>&#123;</span><br><span class="line"> <span class="function"><span class="keyword">float</span> <span class="title">getInterpolation</span><span class="params">(<span class="keyword">float</span> input)</span></span>;</span><br><span class="line">&#125;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">interface</span> <span class="title">Interpolator</span> <span class="keyword">extends</span> <span class="title">TimeInterpolator</span> </span>&#123;</span><br><span class="line">&#125;</span><br></pre>
<p>1.自定义插值器</p>
<pre class="highlight"><span class="line"><span class="keyword">package</span> com.cupster.animation;</span><br><span class="line"><span class="keyword">import</span> android.view.animation.Interpolator;</span><br><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">SinInterpolater</span> <span class="keyword">implements</span> <span class="title">Interpolator</span> </span>&#123;</span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">float</span> <span class="title">getInterpolation</span><span class="params">(<span class="keyword">float</span> input)</span> </span>&#123;</span><br><span class="line">        input = input -<span class="number">0.5f</span>;</span><br><span class="line">        <span class="keyword">return</span> (<span class="keyword">float</span>)Math.sin(<span class="number">60</span>*input) + <span class="number">0.5f</span>;</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre>

<p>2.封装使用方法</p>
<pre class="highlight"><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">myAnim</span><span class="params">(View target ,<span class="keyword">float</span>... transx)</span></span>&#123;</span><br><span class="line">       ObjectAnimator animator = ObjectAnimator.ofFloat(target ,<span class="string">&quot;translationX&quot;</span>,transx);</span><br><span class="line">       animator.setDuration(<span class="number">3000</span>);</span><br><span class="line">       animator.setInterpolator(<span class="keyword">new</span> SinInterpolater());</span><br><span class="line">       animator.start();</span><br><span class="line">   &#125;</span><br></pre>

<p>3.使用</p>
<pre class="highlight"><span class="line">img = findViewById(R.id.anim_view);</span><br><span class="line">img.setOnClickListener(<span class="keyword">new</span> View.OnClickListener() &#123;</span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">onClick</span><span class="params">(View view)</span> </span>&#123;</span><br><span class="line">        PropAnimatorHelper.myAnim(view ,<span class="number">0</span>,<span class="number">10</span>,<span class="number">0</span>,<span class="number">10</span>);<span class="comment">//点击后左右抖动</span></span><br><span class="line">    &#125;</span><br><span class="line">&#125;);</span><br></pre>

<p>4.效果：点击后左右抖动</p>
<img src="https://gitee.com/cupster/picbed/raw/master/uPic/20210204104605_interpolator.gif" / srcset="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20300%20300'%3E%3C/svg%3E" data-src="https://gitee.com/cupster/picbed/raw/master/uPic/20210204104605_interpolator.gif" class="lozad post-image">


<h1 id="3-估值器-TypeEvaluator"><a href="#3-估值器-TypeEvaluator" class="headerlink" title="3.估值器 TypeEvaluator"></a>3.估值器 TypeEvaluator</h1><p>估值器是定义动画进度值的取值规则。</p>
<p>系统默认的FloatEvaluator、IntEvaluator都是根据进度值自然线性递增。</p>
<pre class="highlight"><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">FloatEvaluator</span> <span class="keyword">implements</span> <span class="title">TypeEvaluator</span>&lt;<span class="title">Number</span>&gt; </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> Float <span class="title">evaluate</span><span class="params">(<span class="keyword">float</span> fraction, Number startValue, Number endValue)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">float</span> startFloat = startValue.floatValue();</span><br><span class="line">        <span class="keyword">return</span> startFloat + fraction * (endValue.floatValue() - startFloat);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;</span><br></pre>

<p>举例：0-100的取值范围，就是1，2，3，4，…，99，100</p>
<p>根据使用场景，我们可以自定义估值器，获得如：<br>0，3，6，9，…，96，99</p>
<h1 id="3-1-自定义估值器"><a href="#3-1-自定义估值器" class="headerlink" title="3.1 自定义估值器"></a>3.1 自定义估值器</h1><p>TypeEvaluator接口</p>
<pre class="highlight"><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">interface</span> <span class="title">TypeEvaluator</span>&lt;<span class="title">T</span>&gt; </span>&#123;</span><br><span class="line">                <span class="comment">//fraction进度值</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> T <span class="title">evaluate</span><span class="params">(<span class="keyword">float</span> fraction, T startValue, T endValue)</span></span>;</span><br><span class="line">&#125;</span><br></pre>

<p>1.自定义估值器</p>
<pre class="highlight"><span class="line"><span class="keyword">package</span> com.cupster.animation;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> android.animation.TypeEvaluator;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 此处代码为郭霖大神编写的自定义Evaluator，用于扩展属性动画:&quot;color&quot;,</span></span><br><span class="line"><span class="comment"> * 使用该动画的View需设置对应public void setColor,并在其中调用invalidate()</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">ColorEvaluator</span> <span class="keyword">implements</span> <span class="title">TypeEvaluator</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> mCurrentRed = -<span class="number">1</span>;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> mCurrentGreen = -<span class="number">1</span>;</span><br><span class="line"></span><br><span class="line">    <span class="keyword">private</span> <span class="keyword">int</span> mCurrentBlue = -<span class="number">1</span>;</span><br><span class="line"></span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> Object <span class="title">evaluate</span><span class="params">(<span class="keyword">float</span> fraction, Object startValue, Object endValue)</span> </span>&#123;</span><br><span class="line">        String startColor = (String) startValue;</span><br><span class="line">        String endColor = (String) endValue;</span><br><span class="line">        <span class="keyword">int</span> startRed = Integer.parseInt(startColor.substring(<span class="number">1</span>, <span class="number">3</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="keyword">int</span> startGreen = Integer.parseInt(startColor.substring(<span class="number">3</span>, <span class="number">5</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="keyword">int</span> startBlue = Integer.parseInt(startColor.substring(<span class="number">5</span>, <span class="number">7</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="keyword">int</span> endRed = Integer.parseInt(endColor.substring(<span class="number">1</span>, <span class="number">3</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="keyword">int</span> endGreen = Integer.parseInt(endColor.substring(<span class="number">3</span>, <span class="number">5</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="keyword">int</span> endBlue = Integer.parseInt(endColor.substring(<span class="number">5</span>, <span class="number">7</span>), <span class="number">16</span>);</span><br><span class="line">        <span class="comment">// 初始化颜色的值</span></span><br><span class="line">        <span class="keyword">if</span> (mCurrentRed == -<span class="number">1</span>) &#123;</span><br><span class="line">            mCurrentRed = startRed;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (mCurrentGreen == -<span class="number">1</span>) &#123;</span><br><span class="line">            mCurrentGreen = startGreen;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">if</span> (mCurrentBlue == -<span class="number">1</span>) &#123;</span><br><span class="line">            mCurrentBlue = startBlue;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="comment">// 计算初始颜色和结束颜色之间的差值</span></span><br><span class="line">        <span class="keyword">int</span> redDiff = Math.abs(startRed - endRed);</span><br><span class="line">        <span class="keyword">int</span> greenDiff = Math.abs(startGreen - endGreen);</span><br><span class="line">        <span class="keyword">int</span> blueDiff = Math.abs(startBlue - endBlue);</span><br><span class="line">        <span class="keyword">int</span> colorDiff = redDiff + greenDiff + blueDiff;</span><br><span class="line">        <span class="keyword">if</span> (mCurrentRed != endRed) &#123;</span><br><span class="line">            mCurrentRed = getCurrentColor(startRed, endRed, colorDiff, <span class="number">0</span>,</span><br><span class="line">                    fraction);</span><br><span class="line">        &#125; <span class="keyword">else</span> <span class="keyword">if</span> (mCurrentGreen != endGreen) &#123;</span><br><span class="line">            mCurrentGreen = getCurrentColor(startGreen, endGreen, colorDiff,</span><br><span class="line">                    redDiff, fraction);</span><br><span class="line">        &#125; <span class="keyword">else</span> <span class="keyword">if</span> (mCurrentBlue != endBlue) &#123;</span><br><span class="line">            mCurrentBlue = getCurrentColor(startBlue, endBlue, colorDiff,</span><br><span class="line">                    redDiff + greenDiff, fraction);</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="comment">// 将计算出的当前颜色的值组装返回</span></span><br><span class="line">        String currentColor = <span class="string">&quot;#&quot;</span> + getHexString(mCurrentRed)</span><br><span class="line">                + getHexString(mCurrentGreen) + getHexString(mCurrentBlue);</span><br><span class="line">        <span class="keyword">return</span> currentColor;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 根据fraction值来计算当前的颜色。</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">private</span> <span class="keyword">int</span> <span class="title">getCurrentColor</span><span class="params">(<span class="keyword">int</span> startColor, <span class="keyword">int</span> endColor, <span class="keyword">int</span> colorDiff,</span></span></span><br><span class="line"><span class="function"><span class="params">                                <span class="keyword">int</span> offset, <span class="keyword">float</span> fraction)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">int</span> currentColor;</span><br><span class="line">        <span class="keyword">if</span> (startColor &gt; endColor) &#123;</span><br><span class="line">            currentColor = (<span class="keyword">int</span>) (startColor - (fraction * colorDiff - offset));</span><br><span class="line">            <span class="keyword">if</span> (currentColor &lt; endColor) &#123;</span><br><span class="line">                currentColor = endColor;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">            currentColor = (<span class="keyword">int</span>) (startColor + (fraction * colorDiff - offset));</span><br><span class="line">            <span class="keyword">if</span> (currentColor &gt; endColor) &#123;</span><br><span class="line">                currentColor = endColor;</span><br><span class="line">            &#125;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">return</span> currentColor;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 将10进制颜色值转换成16进制。</span></span><br><span class="line"><span class="comment">     */</span></span><br><span class="line">    <span class="function"><span class="keyword">private</span> String <span class="title">getHexString</span><span class="params">(<span class="keyword">int</span> value)</span> </span>&#123;</span><br><span class="line">        String hexString = Integer.toHexString(value);</span><br><span class="line">        <span class="keyword">if</span> (hexString.length() == <span class="number">1</span>) &#123;</span><br><span class="line">            hexString = <span class="string">&quot;0&quot;</span> + hexString;</span><br><span class="line">        &#125;</span><br><span class="line">        <span class="keyword">return</span> hexString;</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre>


<p>2.封装方法</p>
<pre class="highlight"><span class="line"><span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">propColorAnimator</span><span class="params">(ColorTextView target , String startColor , String endColor)</span></span>&#123;</span><br><span class="line">     ObjectAnimator animator = ObjectAnimator.ofObject(target ,<span class="string">&quot;color&quot;</span>,<span class="keyword">new</span> ColorEvaluator() ,startColor,endColor);</span><br><span class="line">     animator.setDuration(<span class="number">3000</span>);</span><br><span class="line">     animator.start();</span><br><span class="line"> &#125;</span><br></pre>

<p>3.扩展View</p>
<pre class="highlight"><span class="line"><span class="class"><span class="keyword">class</span> <span class="title">ColorTextView</span> <span class="keyword">extends</span> <span class="title">TextView</span> </span>&#123;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">setColor</span><span class="params">(String color)</span></span>&#123;</span><br><span class="line">        setTextColor(Color.parseColor(color));</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="title">ColorTextView</span><span class="params">(Context context)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">super</span>(context);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="title">ColorTextView</span><span class="params">(Context context, <span class="meta">@Nullable</span> AttributeSet attrs)</span> </span>&#123;</span><br><span class="line">        <span class="keyword">super</span>(context, attrs);</span><br><span class="line">    &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre>

<p>4.使用</p>
<pre class="highlight"><span class="line">img = findViewById(R.id.anim_view);</span><br><span class="line">img.setOnClickListener(<span class="keyword">new</span> View.OnClickListener() &#123;</span><br><span class="line">    <span class="meta">@Override</span></span><br><span class="line">    <span class="function"><span class="keyword">public</span> <span class="keyword">void</span> <span class="title">onClick</span><span class="params">(View view)</span> </span>&#123;</span><br><span class="line">        PropAnimatorHelper.propColorAnimator((ColorTextView) view,<span class="string">&quot;#a7dbf7&quot;</span> ,<span class="string">&quot;#ff8696&quot;</span>);</span><br><span class="line">    &#125;</span><br><span class="line">&#125;);</span><br></pre>

<img src="https:/ srcset="data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20viewBox='0%200%20300%20300'%3E%3C/svg%3E" data-src="https://gitee.com/cupster/picbed/raw/master/uPic/20210203165433_color.gif" class="lozad post-image"/gitee.com/cupster/picbed/raw/master/uPic/20210203165433_color.gif"/>

  </div>
  <div>
  
  <div class="post-note note-warning copyright" style="margin-top: 42px">
    <p><span style="font-weight: bold;">作者：</span><a target="_blank" rel="nofollow noopener noreferrer" href="http://example.com/about">Cupster</a></p>
    <p><span style="font-weight: bold;">文章链接：</span><a target="_blank" rel="nofollow noopener noreferrer" href="http://example.com/2019/09/02/023-Android%E5%8A%A8%E7%94%BB%EF%BC%883%EF%BC%89%EF%BC%9A%E6%8F%92%E5%80%BC%E5%99%A8%E4%B8%8E%E4%BC%B0%E5%80%BC%E5%99%A8%E8%AF%A6%E8%A7%A3/">http://example.com/2019/09/02/023-Android%E5%8A%A8%E7%94%BB%EF%BC%883%EF%BC%89%EF%BC%9A%E6%8F%92%E5%80%BC%E5%99%A8%E4%B8%8E%E4%BC%B0%E5%80%BC%E5%99%A8%E8%AF%A6%E8%A7%A3/</a></p>
    <p><span style="font-weight: bold;">版权声明：</span>本博客所有文章除特别声明外，均采用<a target="_blank" rel="noopener" href="https://creativecommons.org/licenses/by-nc-sa/4.0/deed.zh">CC BY-NC-SA 4.0 协议</a>。转载请注明出处！</p>
  </div>
  
  </div>
</article>
<div class="nav">
  
  <div class="nav-item-prev">
    <a href="/2019/09/09/024-Android自定义对话框（1）：DialogFragment图文详解/" class="nav-link">
      <i class="iconfont icon-left nav-prev-icon"></i>
      <div>
        <div class="nav-label">上一篇</div>
        
        <div class="nav-title">024-Android自定义对话框（1）：DialogFragment图文详解 </div>
        
      </div>
    </a>
  </div>
  
  
  <div class="nav-item-next">
    <a href="/2019/08/28/022-Android动画（2）：属性动画详解/" class="nav-link">
      <div>
        <div class="nav-label">下一篇</div>
        
        <div class="nav-title">022-Android动画（2）：属性动画详解 </div>
        
      </div>
      <i class="iconfont icon-right nav-next-icon"></i>
    </a>
  </div>
  
</div>

<div class="card card-content toc-card" id="mobiletoc">
  <div class="toc-header"><i class="iconfont icon-menu" style="padding-right: 2px;"></i>目录</div>
<ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link" href="#1-%E7%AE%80%E8%BF%B0"><span class="toc-text">1.简述</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-%E6%8F%92%E5%80%BC%E5%99%A8-Interpolator"><span class="toc-text">2. 插值器 Interpolator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E6%8F%92%E5%80%BC%E5%99%A8"><span class="toc-text">2.1 自定义插值器</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-%E4%BC%B0%E5%80%BC%E5%99%A8-TypeEvaluator"><span class="toc-text">3.估值器 TypeEvaluator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E4%BC%B0%E5%80%BC%E5%99%A8"><span class="toc-text">3.1 自定义估值器</span></a></li></ol>
</div></main>
          <aside class="left-column">
            
            <div class="card card-author">
              
<img src="/img/ic_head.jpg" class="author-img">

<p class="author-name">Cupster</p>
<p class="author-description">深山磨柴斧，一鸣震江湖</p>
<div class="author-message">
  <a class="author-posts-count" href="/archives">
    <span>66</span>
    <span>文章</span>
  </a>
  <a class="author-categories-count" href="/categories">
    <span>5</span>
    <span>分类</span>
  </a>
  <a class="author-tags-count" href="/tags">
    <span>31</span>
    <span>标签</span>
  </a>
</div>

<div class="author-card-society">
  
    <div class="author-card-society-icon">
      <a target="_blank" rel="noopener" href="https://cupster.blog.csdn.net/">
        <i class="iconfont /img/ic_csdn.png society-icon"></i>
      </a>
    </div>
  
</div>

            </div>
            
            <div class="sticky-tablet">
  
  
  <article class="display-when-two-columns spacer">
    <div class="card card-content toc-card">
      <div class="toc-header"><i class="iconfont icon-menu" style="padding-right: 2px;"></i>目录</div>
<ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link" href="#1-%E7%AE%80%E8%BF%B0"><span class="toc-text">1.简述</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-%E6%8F%92%E5%80%BC%E5%99%A8-Interpolator"><span class="toc-text">2. 插值器 Interpolator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E6%8F%92%E5%80%BC%E5%99%A8"><span class="toc-text">2.1 自定义插值器</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-%E4%BC%B0%E5%80%BC%E5%99%A8-TypeEvaluator"><span class="toc-text">3.估值器 TypeEvaluator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E4%BC%B0%E5%80%BC%E5%99%A8"><span class="toc-text">3.1 自定义估值器</span></a></li></ol>
    </div>
  </article>
  
  
  <article class="card card-content categories-widget">
    <div class="categories-card">
  <div class="categories-header"><i class="iconfont icon-fenlei" style="padding-right: 2px;"></i>分类</div>
  <div class="categories-list">
    
      <a href="/categories/Android/">
        <div class="categories-list-item">
          Android
          <span class="categories-list-item-badge">38</span>
        </div>
      </a>
    
      <a href="/categories/Linux/">
        <div class="categories-list-item">
          Linux
          <span class="categories-list-item-badge">6</span>
        </div>
      </a>
    
      <a href="/categories/Dev-Base/">
        <div class="categories-list-item">
          Dev-Base
          <span class="categories-list-item-badge">12</span>
        </div>
      </a>
    
      <a href="/categories/Kotlin/">
        <div class="categories-list-item">
          Kotlin
          <span class="categories-list-item-badge">9</span>
        </div>
      </a>
    
      <a href="/categories/自动化脚本/">
        <div class="categories-list-item">
          自动化脚本
          <span class="categories-list-item-badge">1</span>
        </div>
      </a>
    
  </div>
</div>
  </article>
  
  <article class="card card-content tags-widget">
    <div class="tags-card">
  <div class="tags-header"><i class="iconfont icon-biaoqian" style="padding-right: 2px;"></i>热门标签</div>
  <div class="tags-list">
    
    <a href="/tags/Android/" title="Android"><div class="tags-list-item">Android</div></a>
    
    <a href="/tags/Android自定义View/" title="Android自定义View"><div class="tags-list-item">Android自定义View</div></a>
    
    <a href="/tags/MacOS/" title="MacOS"><div class="tags-list-item">MacOS</div></a>
    
    <a href="/tags/Kotlin/" title="Kotlin"><div class="tags-list-item">Kotlin</div></a>
    
    <a href="/tags/Android持久化/" title="Android持久化"><div class="tags-list-item">Android持久化</div></a>
    
    <a href="/tags/CentOS/" title="CentOS"><div class="tags-list-item">CentOS</div></a>
    
    <a href="/tags/Linux/" title="Linux"><div class="tags-list-item">Linux</div></a>
    
    <a href="/tags/Android事件/" title="Android事件"><div class="tags-list-item">Android事件</div></a>
    
    <a href="/tags/Android基础/" title="Android基础"><div class="tags-list-item">Android基础</div></a>
    
    <a href="/tags/Android手势/" title="Android手势"><div class="tags-list-item">Android手势</div></a>
    
    <a href="/tags/Scrcpy/" title="Scrcpy"><div class="tags-list-item">Scrcpy</div></a>
    
    <a href="/tags/Android动画/" title="Android动画"><div class="tags-list-item">Android动画</div></a>
    
    <a href="/tags/Git/" title="Git"><div class="tags-list-item">Git</div></a>
    
    <a href="/tags/Java/" title="Java"><div class="tags-list-item">Java</div></a>
    
    <a href="/tags/Docker/" title="Docker"><div class="tags-list-item">Docker</div></a>
    
    <a href="/tags/Android-Dialog/" title="Android Dialog"><div class="tags-list-item">Android Dialog</div></a>
    
  </div>
</div>
  </article>
  
  
</div>
          </aside>
          <aside class="right-column">
            <div class="sticky-widescreen">
  
  
  <article class="card card-content toc-card">
    <div class="toc-header"><i class="iconfont icon-menu" style="padding-right: 2px;"></i>目录</div>
<ol class="toc"><li class="toc-item toc-level-1"><a class="toc-link" href="#1-%E7%AE%80%E8%BF%B0"><span class="toc-text">1.简述</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-%E6%8F%92%E5%80%BC%E5%99%A8-Interpolator"><span class="toc-text">2. 插值器 Interpolator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#2-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E6%8F%92%E5%80%BC%E5%99%A8"><span class="toc-text">2.1 自定义插值器</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-%E4%BC%B0%E5%80%BC%E5%99%A8-TypeEvaluator"><span class="toc-text">3.估值器 TypeEvaluator</span></a></li><li class="toc-item toc-level-1"><a class="toc-link" href="#3-1-%E8%87%AA%E5%AE%9A%E4%B9%89%E4%BC%B0%E5%80%BC%E5%99%A8"><span class="toc-text">3.1 自定义估值器</span></a></li></ol>
  </article>
  
  
  <article class="card card-content">
    <div class="recent-posts-card">
  <div class="recent-posts-header"><i class="iconfont icon-wenzhang_huaban" style="padding-right: 2px;"></i>最近文章</div>
  <div class="recent-posts-list">
    
      <div class="recent-posts-item">
        <div class="recent-posts-item-title">2021-03-02</div>
        <a href="/2021/03/02/Git commit规范/"><div class="recent-posts-item-content">Git commit规范</div></a>
      </div>
    
      <div class="recent-posts-item">
        <div class="recent-posts-item-title">2021-02-16</div>
        <a href="/2021/02/16/AutoJS一文精通AutoJS脚本教程详解/"><div class="recent-posts-item-content">AutoJS一文精通AutoJS脚本教程详解</div></a>
      </div>
    
      <div class="recent-posts-item">
        <div class="recent-posts-item-title">2021-01-21</div>
        <a href="/2021/01/21/架构师进阶：注解Annotation全解/"><div class="recent-posts-item-content">架构师进阶：注解Annotation全解</div></a>
      </div>
    
      <div class="recent-posts-item">
        <div class="recent-posts-item-title">2021-01-06</div>
        <a href="/2021/01/06/ConstraintLayout详解/"><div class="recent-posts-item-content">ConstraintLayout详解</div></a>
      </div>
    
  </div>
</div>
  </article>
  
  
</div>
          </aside>
        </div>
      </div>
    </div>
  </div>
  
  <footer class="footer">
  <div class="footer-container">
    <div>
      <div class="footer-dsc">
        <span>Copyright ©
          
          2020 -
          
          2021
        </span>
        &nbsp;
        <a href="/" class="footer-link">不负明天 </a>
      </div>
    </div>

    
    <div class="footer-dsc">
      
      Powered by
      <a href="https://hexo.io/" class="footer-link" target="_blank" rel="nofollow noopener noreferrer">&nbsp;Hexo </a>
      
      
      <span>&nbsp;|&nbsp;</span>
      
      
      Theme -
      <a href="https://github.com/theme-kaze" class="footer-link" target="_blank"
        rel="nofollow noopener noreferrer">&nbsp;Kaze</a>
      
    </div>
    
    
    
    
      <div class="footer-dsc">
        
        本站总访问量686<span id="busuanzi_value_site_pv"></span>次
        
        
        <span>&nbsp;|&nbsp;</span>
        
        
        本站总访客数219<span id="busuanzi_value_site_uv"></span>次
        
      </div>
      
    
</footer>
  <a role="button" id="scrollbutton" class="basebutton"  aria-label="回到顶部">
  <i class="iconfont icon-arrowleft button-icon"></i>
</a>
<a role="button" id="menubutton" class="basebutton">
  <i class="iconfont icon-menu button-icon"></i>
</a>
<a role="button" id="popbutton" class="basebutton" aria-label="控制中心">
  <i class="iconfont icon-expand button-icon"></i>
</a>
<a role="button" id="darkbutton" class="basebutton darkwidget" aria-label="夜色模式">
  <i class="iconfont icon-weather button-icon"></i>
</a>
<a role="button" id="searchbutton" class="basebutton searchwidget" aria-label="搜索">
  <i class="iconfont icon-search button-icon"></i>
</a>

  
  
  
  <script>
  var addImgLayout = function () {
    var img = document.querySelectorAll('.post-content img');
    var i;
    for (i = 0; i < img.length; i++) {
      var wrapper = document.createElement('a');
      wrapper.setAttribute('href', img[i].getAttribute('data-src'));
      wrapper.setAttribute('aria-label', 'illustration');
      wrapper.style.cssText = 'width: 100%; display: flex; justify-content: center;';
      if (img[i].alt) wrapper.dataset.caption = img[i].alt;
      wrapper.dataset.nolink = true;
      img[i].before(wrapper);
      wrapper.append(img[i]);
      var divWrap = document.createElement('div');
      divWrap.classList.add('gallery');
      wrapper.before(divWrap);
      divWrap.append(wrapper);
    }
    baguetteBox.run('.gallery');
  }
</script>
<script>loadScript("/js/lib/lightbox/baguetteBox.min.js", addImgLayout)</script>
  
  
  
<script src="/js/main.js"></script>

  
  <script>loadScript("/js/lib/busuanzi.min.js")</script>
  
  
  <script>
    var addLazyload = function () {
      var observer = lozad('.lozad', {
        load: function (el) {
          el.srcset = el.getAttribute('data-src');
        },
        loaded: function (el) {
          el.classList.add('loaded');
        }
      });
      observer.observe();
    }
  </script>
  <script>loadScript("/js/lib/lozad.min.js", addLazyload)</script>
  
  
</body>

</html>